<template>
    <div class="app-container">
        <!--表单-->
        <el-form :inline="true" class="demo-form-inline">

            <el-form-item>
                <el-select v-model="searchObj.type" clearable placeholder="请选择">
                    <el-option label="学员登录数统计" value="login_num"/>
                    <el-option label="学员注册数统计" value="register_num"/>
                    <el-option label="课程播放数统计" value="video_view_num"/>
                    <el-option label="每日课程数统计" value="course_num"/>
                </el-select>
            </el-form-item>

            <el-form-item>
                <el-date-picker
                    v-model="searchObj.begin"
                    type="date"
                    placeholder="选择开始日期"
                    value-format="yyyy-MM-dd" />
            </el-form-item>
            <el-form-item>
                <el-date-picker
                    v-model="searchObj.end"
                    type="date"
                    placeholder="选择截止日期"
                    value-format="yyyy-MM-dd" />
            </el-form-item>
            <el-button
                :disabled="btnDisabled"
                type="primary"
                icon="el-icon-search"
                @click="showChart()">查询</el-button>
        </el-form>

        <div class="chart-container">
            <div id="chart" class="chart" style="height:500px;width:100%" />
        </div>
    </div>
</template>
<script>
	import echarts from 'echarts'
	import staApi from '@/api/sta'

	export default {
		data() {
			return {
				searchObj:{},
				btnDisabled:false,
				xData:[],
				yData:[]
			}
		},
		methods:{
			showChart() {
				staApi.getDataSta(this.searchObj)
					.then(response => {
						console.log('*****************'+response)
						this.yData = response.data.numList
						this.xData = response.data.dateList

						//调用下面生成图表的方法，改变值
						this.setChart()
					})
			},
			setChart() {
				// 基于准备好的dom，初始化echarts实例
				this.chart = echarts.init(document.getElementById('chart'))
				// console.log(this.chart)

				// 指定图表的配置项和数据
				var option = {
					title: {
						text: '数据统计'
					},
					tooltip: {
						trigger: 'axis'
					},
					dataZoom: [{
						show: true,
						height: 30,
						xAxisIndex: [
							0
						],
						bottom: 30,
						start: 10,
						end: 80,
						handleIcon: 'path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z',
						handleSize: '110%',
						handleStyle: {
							color: '#d3dee5'

						},
						textStyle: {
							color: '#fff'
						},
						borderColor: '#90979c'
					},
						{
							type: 'inside',
							show: true,
							height: 15,
							start: 1,
							end: 35
						}],
					// x轴是类目轴（离散数据）,必须通过data设置类目数据
					xAxis: {
						type: 'category',
						data: this.xData
					},
					// y轴是数据轴（连续数据）
					yAxis: {
						type: 'value'
					},
					// 系列列表。每个系列通过 type 决定自己的图表类型
					series: [{
						// 系列中的数据内容数组
						data: this.yData,
						// 折线图
						type: 'line'
					}]
				}

				this.chart.setOption(option)
			}
		}
	}
</script>
